One example of the extreme cold took place in Denver, Colorado on Monday where the high temperature topped out at 16°F. This was not only the coldest high temperature ever recorded in Denver during the month of October, it completely shattered the previous daily record for October 26 by almost halving the comparatively “balmy” 31°F that was set in 1923. The records in Denver go all the way to 1872 (i.e., 142 years) and the prior coldest high temperature in October was 18°F. Another example of the extreme cold occurred in Bozeman, Montana earlier today where the low temperature recorded was -20°F, which is 31 degrees below the previous record of +11°F. Finally, the astonishing cold in the Rockies featured a low temperature earlier today of -26°F in Laramie, Wyoming which, if verified, would not only break the monthly record for the month of October by 8 degrees, it would tie the coldest temperature for any day in November.
In terms of snow, accumulations will be significant over the next 36 hours or so in parts of New Mexico and Texas with more than half a foot in some spots on top of what has already been received. There was as much as a foot and a half observed yesterday in some areas in the Colorado Rockies. Earlier in this extended cold spell, there was impressive accumulating snow in an area extending from the interior Northwest to the Northern Plains. For example, Great Falls, Montana experienced its snowiest “one-day” ever in the month of October and also its greatest “two-day” snowfall total ever. In Alexandria, Minnesota, the snowfall this month has already made it the most ever for the month of October.